Carburetor



2 Sheets-Sheet l A i v f ru June 22 1926.

June' 22 192s.

L. F. BURGER CARBURETOR Original Filed April 22. 1918 2 Sheets-Sheet 2 .Iman/@07", Le'ojvQZcZl ,B1/ayer,

Patented June 22, 1926.

UNI-.TED PATENT OFFICE.

LEOPOLD F. BURGER, 0F RIVERSIDE, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO TNTERNATIONAL' HARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

CARBURETOR.

This invention relates to carlniretors for internall combustion engines and is a division of myapplication for Letters Patent, Serial Number 2O-,O36,.filed April 22, 1918.

Worefspecilically,` this invention relates to a carburetor for theheavier fuels such as kerosene, and te ameans for supplying mois ture -tothemiXt-ure before it enters the en? gine cylinders` to tlieieby'eflfect more eflicient utilization of the-fuel. I haveillustrated one embodiment of luy-invention in the accompanying drawings, in which"- Figure 1 `is a horizontal section of my carburetorA taken on thebroken line 1.--1 of. Figure 2;

Figure 2v is a front elevation of the-same partly in section ont-he broken line'f2---2 of Figure l;

Figure 3 is fapla-n viewaofthe carburetor;

yFigure4isa vertical section through the auxiliary air VValve-on the line 4-4 Vof Figure 3:

Figure bis a vertical sect-ionfthrough the water valve-onY the line 5-5 ofFigure 3; and

Figure 6 is a vertical. sectionthrough the fuel valve onthe line6-6 of-Figure This carburetor comprises va Vbody 11 containingthe fuel Vreservoir 12, the supply chamber-i153, Vand the overflow chamber i4. The upper part-of the bodyis surmounted by a Ahooded portion 15 having the air passage 16l partially closed `by the auxiliary7 valvel, which is pressed by the'spring 18, said. :valvehaving openings 19v which are always open for the free passage of nir. This air passage-leads to the downwardly disposedv Venturi tube 20,which in-turn leads to the inlet valve of the internal combustion engine. Betweenthe supply chamber 13 and reservoir 12 Ais placed the weir or dam '21, and between the `fuel reservoir and the -overiow chamber 14 lis placed another and. lower fweirg22. Between vthe supply chamber:13l andA overliow chamber 14k is placed a three-way Valve v23, having a longi-y tudinalcavity 25 and ra port 24 communicatingtherewith*through the side. Drain passagesQ-S, 29 :and v30 lead respectively from the supplyfchamber,'.fuelxreservoir, and overflow chamber. These passagesvare-all :trranged vindire-, same' l-plane with each other and with the port 24 of the rotatable valve 23 so that as the valve is turned it may be brought".ritnrgistrationwith ony one of 230,036. Divided and this application filed May 6,

these passages. The longitudinal cavity 25 in the valve 23 opens into a'passage 26 intol which is tapped the overfiow pipe 2T, which communicates with the main fuel tank of the engine. A fuel supply pipe 31 is vlikewise tapped into the supply chamber 13, and this pipe communicates with the fuel pump or-other source of fuel supply.

At the throat or narrowest portion of the Venturi tube 2O l have placed an opening 32, which may be.regulated by means of the needle. Valve This needle Valve is supplied by means of a tube 34 which reaches down into the fuel reservoir 12, the height of fuel in the reservoir being Lmain tained by the weir 22. A water supply opening 35 is placed in the Venturi tube at the same height as the fuel Valve, which is likewise regulated by aneedle valv y36. This valve is supplied with water through. the

chamber 327, in which is placed a check valve 3S which norinally'closes an opening 39 in the threaded plug 40. This opening is placed directly over a ypassa-ge leading to the water jacket-41 in the head 41 of the engine cylinder. This Avalve is so devised that it will overcome water pressure from the water jacket, and prevent water from iowing into the Venturi tube 2O when the engine is not in operation, but will permit it when the engine isrunning, due to the vacuum produced in the Venturi tube.

The carburetor is .preferably mounted'upon the cylinder head, and fastened by means of cap screws 42, one of which carries a spring 43 which holds the valve 23 on its seat. The valve has a handle 23a, with a projection 23", which is adapted to strike stops 11a in .the carburetor body 11, which are So placed as to indicate the two working positions of the valve'. The top of the carburetor vbody also contains two openings 11'J and 11, which permit the condition of iiow lll) of the fuel tobe readily observed, and which also supply aready means for introducing fuel into the fuel reservoir.

The manipulation of the carburetor, when starting `with a. cold engine,-1s asvfollows: T hewater supply valve-3.6 is first closed, the three-way valve'23 is then'turned to the middleV pesitionv `so .as to bring the opening 24' in registra-tion with the drain 29 to the fuel `rSll-X "Oil. Any fuelthen in thereservoir s-.drained through. the 'passage 26am the overflow pipe 2'? to the main fuel tank. TWhen the fuel reservoir is thoroughly drained the valve 23 is turned so as to bring the port in registration with the opening 2S as to drain the supply chamber 1?, and at the same time to close the fuel reservoir opening into the drain. This is donc because l prefer to supply fuel to the supply -hamber l?) continuously during the opera- ;,iou of the engine, and it is necessary to turn his valve so as to allow this supply of fuel to pass innnediately back to the fuel tank, and not allow it to back up and overflow the weir 2l into the fuel reservoir l2. lVith ne valve in this position gasoline is introccd through the opening lll into the fuel 'voir-'12, and the starte-d.

Enough gasoline is introduced to allow the engine to run until it is thoroughly heated. [is soon as that. done, and the suppl,l vof gasol fe in the fuel reservoir is nearly exhausted, the valve 23 is turned as far in the opposite direction as it will go,

r, in other` wor(l s, until the opening 28 is closed, and the opening SO from the overow chamber is brought into registration with the port 24 of the three-way valve.

lt will be understood that in the meantime kerosene or other fuel has been continuously supplied to the supply chamber 13, and, as before stated, is allowed to return to the main fuel tank through the overflow pipe 2'?. The opening 28 now being closed, this fuel will immediately Aoverflow the weir 2l into the fuel reservoir l2, and as soon as this is filled to the height of the weir 22, this heavier fuel will then overflow over the top of this wcir in the overflow chamber 14:, and thence back through the pipe 27 to the main fuel tank. As soon as the engine has become sufficiently heatcd'to permit, the water valve 36 may be opened, and moisture supplied to the charge received by the cylinder.

lVhat l claim as new is:

l. In a carburetor for an engine having a water jacket, a vertical Venturi tube er tending through the body of the carburetor and adapted to have air discharged downwardly therethrough, a fuel reservoir sur rounding the Venturi tube, a fuel valve connected to the reservoir and discharging into the constricted portion of the Venturi tube, and a water valve projecting through the fuel reservoir and connected to the water jacket to receive water therefrom, saidvwater valve also discharging into the constricted portion of the Venturi tube at a point adjacent the fuel valve.

2. ln a carburetor for an engine having a water jacket, a Venturi tube integral with and extending through the body of the carburetor and adapted to have air discharged therethrough, a fuel reservoir adjacent the Venturi tube, a fuel valve connected to the resarcir and diseharsins ist@ 1,5se,3eo

stricted portion of the Venturi tube, and a water valve projecting through the fuel reservoir and receiving water through a pas-- sage directly connected to the water jacket to receive water therefrom, said water valve also discharging into the constricted portion of the Venturi tube at a point adjacent the fuel valve.

3. ln combinationwith a cylinder having water jacket, a constant level fuel reservoir, a Venturi tube adjacent thereto, fuel and water valves openino' into the Venturi tube at its narrowest portion, a water pas sage for the water Vsupply leading through the fuel reservoir and directly connected to the wat-er jacket, and a pressure controlled valve in said connection. Y

el. ln combination with an engine cylinder having a water jacket, a carburetor body foi-ined from a single casting and ha fing an integral central vertical Venturi tube formed therein, a fuel reservoir surrounding the tube and having a discharge tube opening into the constricted portion of theVenturi tube, a hooded air intake communicating with the Venturi tube at its upper end, and a water passage formed in the casting and communicating at its opposite ends with the water jacket and with the Venturi tube at its constricted portion respectively.

5. ln combination with an engine cylinder having a water jacket, a carburetor, a single piece casting having a vertically disposed Venturi tube formed therein, said Venturi tube adapted to have air discharged downwardly therethrough, a chamber surrounding the tube and forming a constant level fuel reservoir, a fuel intake passage in the casting, a fuel nozzle leading from the reservoir to the throat of the Venturi tube, and a water passage having one end opening througha wall of the casting so as to have direct communication with the water jacket of the engine and the other end discharging into theithroat of the Venturi tube.

6. In a carburetor, a single piece casting ture,

ln testimony whereof l aiiixY my signa- 

